Ecosystem firms have been dominantly implementing knowledge sharing and collaboration between consumer interest groups, business firms and technology platform vendors (Adner, 2016). The ecosystem businesses create new value through business activity arrangements and individual offerings of the shared assets, standards, and interfaces upon a technology platform (Adner, 2006). Face with the highly dynamic and competitive environment, the multisided ecosystem platform firms specifically design mobile app to generate more participation in co-creation of value (Roma & Vasi, 2019). Little research has been dedicated for mobile app developers to understand user’s context-centric and user’s personalistic-centric mobility to formulate diversification or specialization in the cocreation strategic process. Our work focuses on the ecosystem users and customers as focal stakeholders who experiencing the peer-to-peer ecosystem platforms via mobile application could perceive context-centric and personalistic-centric mobility to fit, to make identification, to cocreate value, and to contribute to the ecosystem by their equity.

As a macroscopic research for the interaction of mobile game platform, I have analyzed the differentiation & characteristic of interaction for each platform. ‘Game & Watch’ was the first handheld game console released by Nintendo in 1980, the initial model was merely a combination of clock and game consoles to emphasize mobility. However, ‘Game&Watch:DonkeyKong’ which equipped with Yokoi Gunpei’s cross key provided an opportunity for the development of a full-fledged multi-screen gaming. ‘GameBoy’ was the beginning of a portable game machine in the modern sense. It has brought a lot of changes for the gameplay pattern using the contrast of color, smooth animation, as well as interchangeable cartridge system. Also, ‘NDS(Nintendo DS)’, which had several interaction system such as dual screen, voice input and touch input, had contributed to expanding the emergence of innovative game content and women game users. ‘PSP(Playstation Portable)’ by SONY in 2004 materialized 3D games using high performance and progressed to multimedia platform.

The mobile SNS is a promising e-service platform of the future. However, measuring its service quality is a challenge. An appropriate model for measuring service quality is required. This paper proposes e-service quality models for analyzing mobile SNS platform quality, based on previous service quality researches. An empirical study is performed on the proposed models. The results show that constructs of existing e-service models such as responsiveness and assurance do not fit the mobile SNS platform, and that loyalty and value are better measures for mobile service quality.

On July 30, 2012, Kakao Talk of Kakao Co., Ltd has pioneered a mobile platform SNG market for the first time in the country along with the launch of ‘Kakao Game Center’. While Kakao Talk has released a puzzle game called ‘Anipang’ at the time of launching the Kakao Game Center, it has recorded a DAU value exceeding 8 million at the most by dominating the domestic mobile game market for smart phones right after being released. However, a sudden decrease of DAU was shown starting September 4th which is not even two month after being released and the defection of DAU continues to occur. This is a condition which is different from the Facebook SNG which is a computer platform based SNG where the DAU is steadily maintained until now. This study attempts to analyze the cause of such conditions through the comparison between Facebook SNG and Kakao Talk SNG representing each of computer platform based SNG and mobile platform based SNG to present an important reference point for the game creators who are preparing for the participation of mobile platform based SNG industry in the future through this analysis.

This study investigates the difference between popular genre of mobile games and that of online games, and also the impact of affiliation with social network platform on the market performance. The results show that three genres such as action, puzzle, and RPG occupy a higher market share than the other genres. The structure of the mobile game market is more competitive than that of the online game market but game applications developed by top four developers - CJ E&M, NHN, com2us, WeMade - have been holding high ranks for months. It implies that the structure of the mobile game market is gradually becoming more concentrated. As the market competition increases, the marketing cost for acquiring recognition and the commission fee paying for platform have been increasing accordingly. Consequently, mobile game developers are encouraged to enhance the quality of their games as well as to devise diverse platform-marketing strategies in order to accomplish stable market performance.

As contemporary building construction type is getting higher and deeper, construction equipment usage is getting more, and related fatal accidents are on an increasing trend. Because of this, a method was drawn which could grasp the present state of construction equipment management and manage safety of the equipment more easily for accident prevention by choosing 2 kinds of Construction equipment which cause safety accident frequently among the equipment mainly used in construction site. This study suggested a method about construction equipment safety management using "smart phone" base which could be used in safety management for construction equipment by whomever in construction site. After attachment of QR code included safety checklist, It became possible that site managers could check more efficiently by scanning with their smart phone when they inspect equipment. Moreover, by the construction interested who didn't know what and how they have to inspect could point out unsafe condition in the early stage of equipment entering or take unsafe one out of the site by using new smart phone safety checking system is installed, it became possible that critical accident caused by construction equipment was prevented in advance.

As contemporary building construction type is getting higher and deeper,construction equipment usage is getting more, and related fatal accidents are on an increasing trend. In these days, due to the deteriorating construction business circumstance, job finding problem of equipment operator, and dumping contract, equipment lease suppliers are putin jeopardy. In high-rise building construction, especially tower crane, mobile elevated work platform and other High place operation cars among construction equipment cause many critical accidents because of drop supply of construction biding bringing out dumping contract could cause unsafe and poor construction management. Because of this, a method was drawn which could grasp the present state of construction equipment management and manage safety of the equipment more easily for accident prevention by choosing 2 kinds of Construction equipment which cause safety accident frequently among the equipment mainly used in construction site. This study suggested a method about construction equipment safety management using ‘‘smart phone’ base which could be used in safety management for construction equipment by whomever in construction site. After attachment of QR code included safety checklist, It became possible that site managers could check more efficiently by scanning with their smart phone when they inspect equipment. Moreover, by the construction interested who didn’t know what and how they have to inspect could point out unsafe condition in the early stage of equipment entering or take unsafe one out of the site by using new smart phone safety checking system is installed, it became possible that critical accident caused by construction equipment was prevented in advance.

최근 저렴해진 디스플레이 하드웨어와 그래픽 처리 성능의 발전에 따라 대형 디스플레이나 고해상도 타일드 디스 플레이의 활용에 대한 관심이 높아지고 있다. 하지만 기존의 타일드 디스플레이 연구에서는 주로 분산 컴퓨팅 환경에 서 고해상도 병렬 렌더링에 중점을 두고 있으며, 사용자 인터랙션은 크게 지원을 하고 있지 않다. 본 연구에서는 모바일 인터페이스를 사용하여 분산 시스템 고해상도 타일드 디스플레이에서 다수의 사용자들이 여러 개의 가상현실 게임 콘텐츠를 쉽게 조작하고 체험할 수 있는 플랫폼을 제안한다. 본 논문에서는 먼저 타일드 디스플레이나 대형 디스플레이에서의 사용자 인터랙션 관련 연구를 살펴보고, 우리가 제안하는 타일드 디스플레이 기반의 가상현실 게임 플랫폼 구조의 설계 및 구현을 설명한다. 그리고 이 플랫폼을 사용하여 개발한 가상현실 문화유산 게임에 사용자 인터랙션 서비스를 설명하고, 개선점과 추후 연구방향을 제시한다.

In this paper, we present a unified framework for mobile game development. To develop a new mobile game, we need three main entities: game scenario designer (i.e. producer), game graphic designer, and game programmer. Traditionally, there is no systematic support for inter-communication among the three entities. In our scheme, we support co-operative development platform, and three main developers can easily show their idea and also can easily integrate their works. For early stage of game development, we support a scenario simulation tool, where the producer can show his/her idea using the graphical clip made by graphic designer. Once the idea is setup, the graphic designer makes the graphical contents, and delivers to programmer to integrate with mobile games. However, mobile game usually requires efficient memory usage; the programmer should optimize the graphic content. In our platform, we support automatic optimization toolkit and the graphic designer does not need any optimization, and he/she can re-use the graphic content. We applied our platform to WIMAX and CDMA mobile set, and the efficiency and reusability are guaranteed by our automatic optimization.

본 논문에서는 모바일게임의 상생형 네트워크 운영 플랫폼을 제안한다. 논문에서 제안하는 서비스 구조의 특성은 모바일게임 산업에 접목하여 모바일 게임시장에 영향력을 미칠 수 있는 마케팅 네트워크를 형성하고, 산업 단지 내 모바일 게임개발사의 우수 게임 콘텐츠들이 사장되지 않고, 안정적으로 시장에 진입 할 수 있도록 지원 하는 우수한 기능을 지닌 G-크로스 네트워크 운영플랫폼을 제작하였다. 제안된 플랫폼 기술을 이용하면 상생형 네트워크를 통해 빠르게 배포되는 특성 구조와 아울러 새로운 게임이 상용화되어질 때 마다 다양한 데이터 지표 분석을 통하여 지속적인 타겟 마케팅을 지원할 수 있게 된다. 특히 G-Cross 마케팅전략은 주어진 게임 인프라를 활용해 사용자에게 새로운 게임에 대한 정보를 제공하고 각 게임사가 보유한 사용자층을 활용할 수 있다는 측면에서 저비용, 고효율 마케팅방법이라 판단된다.

올해 구글, 애플, 페이스북 등 글로벌 IT 기업들은 모바일 증강현실 플랫폼을 연이어 출시하였다. 기존 증강현실 기술은 AR글래스 또는 탱고폰과 같은 전용 디바이스가 필요하였으나, 이제는 일반 안 드로이드폰과 아이폰에서도 쉽게 증강현실을 경험할 수 있게 되었다. 포켓몬고 게임 이후 관심이 높 아진 모바일 증강현실 게임 시장도 더욱 활성화될 전망이다. 본 고에서는 모바일 증강현실 게임을 위 한 증강현실 플랫폼 기술과 ETRI 프로토타입을 포함한 모바일 증강현실 게임 개발 사례를 사용자 인 터페이스를 중심으로 소개한다.

본 연구는 모바일 게임 플랫폼에서 게임 품질에 대한 정보의 비대칭을 해결하기 위해 게임이용자들이 사용하는 시그널에 대한 질적 연구이다. 시그널 이론을 바탕으로 인터넷 문화기술지 방법을 이용하여 데이터를 수집하였다. 연구결과로 시그널 유형에는 플랫폼 기반의 소비자 참여도가 높은 시그널, 플랫폼 기반의 소비자 참여도가 낮은 시그널, 게임회사 기반의 소비자 참여도가 높은 시그널, 게임회사 기반의 소비자 참여도가 낮은 시그널이 있다. 시그널을 이용한 게임 이용자들의 의사결정의 특징은 첫째, 순위와 다운로드 수는 게임이용자들의 판단의 기준이 되며 둘째, 게임 마케팅 플랫폼은 또 하나의 시그널이 될 수 있으며 마지막으로 게임이용자가 선호하는 시그널은 게임이용 목적이나 행태에 따라 다르다는 것이다.

기존 게임 관련 연구를 살펴보면 게임의 수용, 사용자 만족, 지속사용 의도, 구전 의도와 같 은 연구는 수없이 많이 진행되어 왔으나 서비스 회복의 개념을 게임 연구에 적용시킨 사례는 전무한 상태이다. 본 연구는 국내 주요 모바일 소셜 네트워크 게임 플랫폼인 카카오톡 게임을 중심으로 모바일 소셜 네트워크 게임 특성이 서비스 회복에 미치는 영향을 알아보고자 한다. 또한 공정성 이론과 혁신 확산 이론을 바탕으로 모바일 소셜 네트워크 게임 특성 요인을 분석 하고 해당 요인들과 서비스 회복과의 인과관계를 규명하였다. 그 결과 적합성을 제외한 모든 모바일 소셜 네트워크 게임 특성이 서비스 회복에 직·간접적인 영향을 미친다는 사실을 밝혀냈 다. 이러한 연구결과는 향후 게임 산업의 새로운 비즈니스 모델을 제시하고 위험 요소를 줄여 주며 게임 관련 연구의 발전에 기여할 수 있는 참고자료로 활용될 것이라고 기대하고 있다.

Mobile sources produce a significant fraction of total anthropogenic emissions in Korea and have harmful effects on air quality. Mobile emissions are intrinsically difficult to estimate due to complicated road networks and variations of traffic volume with location and time. To measure traffic pollutants with high temporal and spatial resolution under real conditions a mobile laboratory was designed. The mobile laboratory provide concentrations of SO2, CO, NO, NO2 and location coordinate value. This approach allowed for pollutant level measurements on many roads within short periods of time. In this study, on-road concentrations of SO2, CO, NO and NO2 were measured using mobile platform measurement along the 25 main roads in Busan to estimate the average air pollution level in short time difference. The measurements were conducted on favorable meteorological days from 2010 to 2012 and the overall concentrations of SO2, CO, NO and NO2 were 0.006, 0.8, 0.182 and 0.055 ppm respectively. The result showed that the concentration of CO, NO and NO2 on road were twice, 18 times and 2.5 times higher than regional air quality monitoring sites mean in same period.

Various robot platforms have been designed and developed to perform given tasks in a hazardous environment for the purpose of surveillance, reconnaissance, search and rescue, and etc. We have considered a terrain adaptive hybrid robot platform which is equipped with rapid navigation on flat floors and good performance on overcoming stairs or obstacles. Since our special consideration is posed to its flexibility for real application, we devised a design of a transformable robot structure which consists of an ordinary wheeled structure to navigate fast on flat floor and a variable tracked structure to climb stairs effectively. Especially, track arms installed in front side, rear side, and mid side are used for navigation mode transition between flatland navigation and stairs climbing. The mode transition is determined and implemented by adaptive driving mode control of mobile robot. The wheel and track hybrid mobile platform apparatus applied off-road driving mechanism for various professional service robots is verified through experiments for navigation performance in real and test-bed environment.